View source for Ford Sigma engine

{{Infobox automobile engine
|name          = Ford Sigma engine
|image         = Ford Zetec-S 1.6 16V engine.jpg
|manufacturer  = [[Ford Motor Company]], [[Yamaha Motor Company]]<ref name="lesoir" /><ref name="autonews" />
|aka           = {{ubl |Zetec-S|Zetec-SE|Duratec|Duratec Ti-VCT }}
|production    = 1995–present
|predecessor   = [[Ford CVH engine|CVH Engine]]<br />[[Ford Kent engine#HCS|Valencia-HCS engine]]
|successor     = [[Ford EcoBoost engine]]
|configuration = [[Straight-four engine|I4]]
|displacement  = {{ubl |{{cvt|1242|cc|L CID|1|order=flip}}|{{cvt|1388|cc|L CID|1|order=flip}}|{{cvt|1499|cc|L CID|1|order=flip}}|{{cvt|1596|cc|L CID|1|order=flip}}|{{cvt|1679|cc|L CID|1|order=flip}} }}
|bore          = {{ubl |{{cvt|71.9|mm|in|2}}|{{cvt|76|mm|in|2}}|{{cvt|79|mm|in|2}}|{{cvt|80|mm|in|2}} }}
|stroke        = {{ubl |{{cvt|76.5|mm|in|2}}|{{cvt|81.4|mm|in|2}}|{{cvt|83.5|mm|in|2}} |{{cvt|2000|cc|L CID|1|order=flip}}}}
|emissions control = Close-coupled, closed loop, [[Catalytic converter#Three-way|three-way catalyst]] with [[oxygen sensor]]
|emissions level = [[Euro 4]], [[Euro 5]]
|height        = 
|diameter      = 
|weight        = {{cvt|81|kg|0}} (1.6&nbsp;L Zetec)<br />{{cvt|90|kg|0}} (1.6&nbsp;L Duratec)
|block         = aluminium
|head          = aluminium
|valvetrain    = [[SOHC]] 2 valves x cyl.<br />[[DOHC]] [[Multi-valve#Four valves|4 valves x cyl.]] w/[[Variable Cam Timing#Ti-VCT|Ti-VCT]]
|supercharger  = On 2002 1.0-litre [[Ford Fiesta]]
|turbocharger  = 
|fuelsystem    = [[Electronic fuel injection]]<br />[[Sequential multi-port fuel injection|Sequential multi-port FI]]
|management    = PCM, [[Siemens]]
|fueltype      = gasoline
|oilsystem     = Pressure-fed with full flow oil filter
|coolingsystem = [[Radiator (engine cooling)|Water-cooled]]
|power         = {{cvt|60–155|PS|kW hp|0}}
|specpower     = 
|torque        = {{cvt|109–162|Nm|lbft|0}}
|compression   = 10.0:1, 10.3:1, 11.0:1, 11.8:1
}}

The '''Ford Sigma''' is a small [[Straight-four engine|straight four]] [[automobile]] [[internal combustion engine|engine]] introduced in 1995 by [[Ford Motor Company]]. Its first evolution was sold as the [[Ford Zetec engine#Zetec-SE|Zetec-S]] (not to be confused with the trim level), then Zetec-SE and finally, in later years, renamed [[Ford Duratec engine|Duratec]].<ref>[http://www.config.ford.co.uk/fordconnection/multimedia/gbr_en/00w/yyy/gbr_en00wyyyfuelspc.htm Fuel, performance and emissions Ford Fiesta], Ford.co.uk, 21 April 2009.</ref> The last upgrade of the engine is named Duratec Ti-VCT. Conceived for Ford's smaller models, the motor was intended to replace the older [[Ford HCS engine|HCS]] (a derivative of the even older [[Ford Kent engine|Kent]] unit) and smaller capacity [[Ford CVH engine|CVH]] units.

==Introduction and production==
As with the [[Ford SHO V6 engine|SHO V6 engine]], development of the Zetec-S was a collaborative effort between [[Ford Motor Company|Ford]], [[Mazda]] and [[Yamaha Motor Corporation|Yamaha]].<ref name="lesoir">{{cite web |url=https://www.lesoir.be/art/un-moteur-zetec-leger-original-au-bruit-raffine_t-19960316-Z0AUU7.html |title=Un moteur Zetec léger, original et au bruit raffiné | trans-title = A light Zetec engine, original and with a refined sound | language = fr | last =Binon | first = Pascal |date=March 16, 1996 |archiveurl=https://web.archive.org/web/20220315195925/https://www.lesoir.be/art/un-moteur-zetec-leger-original-au-bruit-raffine_t-19960316-Z0AUU7.html |archivedate=2022-03-15 |url-status=live |work=[[Le Soir]]}}</ref><ref name="autonews">{{cite news |url=https://europe.autonews.com/article/19970707/ANE/707070802/yamaha-coats-cylinders-for-ford-puma |title=Yamaha coats cylinders for Ford Puma | last =Lewin | first = Tony |date=July 7, 1997 |archiveurl=https://web.archive.org/web/20190317232401/https://europe.autonews.com/article/19970707/ANE/707070802/yamaha-coats-cylinders-for-ford-puma |archivedate=2019-03-17 |url-status=live |newspaper=[[Automotive News]]}}</ref> The engine's sound profile was refined in Ford's acoustics center in [[Cologne|Cologne-Merkenich]], [[Germany]].<ref name="lesoir" /> Production of the Zetec-SE was carried out in the Ford Valencia Engine Plant, with Yamaha building the 1.7&nbsp;L engine blocks in Japan.<ref name="lesoir" /><ref name="autonews" />

When the Zetec-SE debuted in 1995, it included many firsts, including a plastic inlet manifold, a "ladder" style [[main bearing]] and [[crankcase]] assembly, and big-end bearing caps which are forged in one piece and subsequently split. It also incorporates [[powder metal]] [[connecting rod]]s, which were quite exotic at the time. This feature makes the engine more challenging to rebuild at the end of its working life, since it is not possible to re-machine the bearing ladder as is done with a conventional cylinder block — the entire assembly has to be renewed. Despite this, engine tuners have found novel ways to increase the power of the unit through use of different valves and increasing the compression ratio of the engine through skimming of the cylinder head.

The engine first appeared in the [[Ford Fiesta (fourth generation)|Mk4 Ford Fiesta]] and the virtually identical [[Mazda 121]] in {{cvt|1242|cc|L|1|order=flip}} capacity, with {{cvt|1388|cc|L|1|order=flip}}, {{convert|1596|cc|L|1|order=flip}} and {{cvt|1679|cc|L|1|order=flip}} derivatives coming later.

==Difference between Zetec-SE/Zetec-S/Duratec/Duratec Ti-VCT==
<gallery widths="200" perrow="6">
File:Zetec SE 125 1.jpg|1.25-litre Duratec engine in a 2009 [[Ford Fiesta]]
File:Ford Zetec-S 1.7 engine.JPG|1.7-litre Zetec-S engine in a [[Ford Puma (coupé)|Ford Puma]]
File:Zetec SE 16 1.jpg|1.6-litre Duratec engine with TI-VCT in a 2012 [[Ford Focus]]
</gallery>

The Sigma engine was introduced under the Zetec-S name; after the upgrade it was renamed to Zetec-SE, Duratec and Duratec Ti-VCT. The latest upgrade of Sigma is called Ecoboost 1.6 engine (Not to be confused with the smaller 1.0 or larger 2.0/2.3 engines)

==Zetec-S/SE==
{| class="wikitable"
|-
!Code!!Years!!Displacement!!Bore x stroke!!Power at rpm!! Torque at rpm!!Compression
|-
|1.25 Zetec-S/SE||1995–||{{cvt|1242|cc|L cuin|1|order=flip}} ||{{cvt|71.9x76.5|mm|in|2}}||{{cvt|75|PS|kW hp|0}} at 5200 || {{cvt|110|Nm|lbft|0}} at 4000||10.0:1
|-
|rowspan=2|1.4 Zetec-S/SE||1998–||rowspan=2|{{cvt|1388|cc|L cuin|1|order=flip}} ||rowspan=2|{{cvt|76x76.5|mm|in|2}}||{{cvt|75|PS|kW hp|0}} at 5000 || {{cvt|124|Nm|lbft|0}} at 3500||11.0:1
|-
|1995–||{{cvt|90|PS|kW hp|0}} at 5500 || {{cvt|123|Nm|lbft|0}} at 4000||10.3:1
|-
|1.6 Zetec-S/SE||1998–||{{cvt|1596|cc|L cuin|1|order=flip}} ||{{cvt|79x81.4|mm|in|2}}||{{cvt|100|PS|kW hp|0}} at 6000 || {{cvt|145|Nm|lbft|0}} at 4000||11.0:1
|-
|}

==Zetec-S==
{| class="wikitable"
|-
|rowspan=2|1.7 Zetec-S [[Variable Cam Timing|VCT]]||1997–||rowspan=2|{{cvt|1679|cc|L cuin|1|order=flip}} ||rowspan=2|{{cvt|80x83.5|mm|in|2}}||{{cvt|125|PS|kW hp|0}} at 6300 || {{cvt|157|Nm|lbft|0}} at 4500||rowspan=2|10.3:1
|-
|1999–||{{cvt|155|PS|kW hp|0}} at 7000 || {{cvt|162|Nm|lbft|0}} at 4500
|-
|}
The {{cvt|1679|cc|L cuin|1|order=flip}} engines uses a heavily modified 1.4&nbsp;L engine block and features [[Variable Cam Timing]] on the inlet camshaft. This displacement has only been used in the [[Ford Puma (coupé)|Ford Puma]]. A {{cvt|155|PS|kW hp|0}} version of this engine was developed for the Ford Racing Puma with only 500 units built.

==Zetec RoCam==
In 2000, [[Ford Motor Company|Ford]] of [[Brazil]] developed a cheaper version of the Zetec-SE engine, to compete with the classic [[Volkswagen EA827 engine]] series known locally as {{ill|Volkswagen AP|pt}} (from ''Alta Performance'', "High Performance" in English) engine in Brazil. It is 8v [[SOHC]] instead of 16v [[DOHC]] and its block is made of cast iron instead of aluminum. Also, its camshaft is driven by a chain instead of a belt. As a result this engine exhibits rougher behaviour, producing more vibration and noise.

On the other hand, it has a superb torque output thanks to the addition of the RoCam (Rollifinger Camshaft) feature. It's also a much smaller engine than the SE version, which allowed it to be installed on the [[Ford Ka]], replacing the [[Ford Kent engine#Endura-E (1995–2002)|Endura-E]] engine which by that time was considered underpowered and outdated.

The engine also featured a new patented process for the aluminum [[Cylinder head|head]] production, which resulted in a better alloy than those produced in Spain and UK, and at a lower production cost.

In 2002 a [[Supercharger|supercharged]] 1.0-litre {{cvt|95|PS|kW hp|0}} version was released for the [[Ford Fiesta]], to compete with the 1.0 Turbo 16v {{cvt|112|PS|kW hp|0}} version of the [[Volkswagen Gol]].

In 2001 the Zetec RoCam engine was introduced in Europe, but labeled as [[Ford Duratec engine#Duratec 8v|Duratec 8v]], for the Ka and Fiesta. Later a 1.6-litre version was also released for the SportKa and StreetKa. The European versions of the engine are produced in the South Africa plant.

In October/2004 a newer [[bi-fuel engine|bi-fuel]] version was introduced labeled "1.6&nbsp;L Flex", capable of running on both petrol and [[Ethanol fuel|ethanol]], even mixed at any proportion. This version also featured a high compression ratio of 12.3:1 and "Compound High Turbulence" chambers, as used on the [[Ford CHT engine|CHT engine]]. The 1.0&nbsp;L Flex runs with a compression of 12.8:1.

Currently, this engine powers nearly all Brazilian [[Ford Motor Company|Ford]] models – except those with 2.0 litre engines – in many different variants:
* 101/106&nbsp;hp 1.6&nbsp;L Flex ([[Ford Ka]])
* 71/73&nbsp;hp 1.0&nbsp;L Flex ([[Ford Fiesta]]), 69/73&nbsp;hp 1.0&nbsp;L Flex after 2012 in Brazil
* 105/111&nbsp;hp 1.6&nbsp;L Flex ([[Ford Fiesta]]/ Fiesta Sedan), ([[Ford Focus (International)|Ford Focus]]), [[Ford EcoSport]])

===Applications===
{{cvt|1596|or|1597|cc|L cuin|1|disp=flip}} applications:
* 2003—2008 [[Ford Ka#StreetKa and SportKa|Ford SportKa]] 1.6, {{cvt|95|PS|kW hp|0}} and {{cvt|100|lbft|Nm|0}}
* 2003—2006 [[Ford Ka#StreetKa and SportKa|Ford StreetKa]] 1.6, {{cvt|95|PS|kW hp|0}} and {{cvt|100|lbft|Nm|0}}

==Duratec==
After an upgrade to the Sigma, Ford renamed it the [[Ford Duratec engine|Duratec]].

{|class="wikitable"
!Code!!Years!!Displacement!!Bore x stroke!!Power!!Torque!!Compression
|-
|rowspan=2|1.25 Duratec||rowspan=2|2008–||rowspan=2|{{cvt|1242|cc|L cuin|1|disp=flip}} ||rowspan=2|{{cvt|71.9x76.5|mm|in|2}}||{{cvt|60|PS|kW hp|0}}|| {{cvt|109|Nm|lbft|0}}||rowspan=5|11.0:1
|-
|{{cvt|80|PS|kW hp|0}}|| {{cvt|114|Nm|lbft|0}}
|-
|rowspan=2|1.4 Duratec||2002–||rowspan=2|{{cvt|1388|cc|L cuin|1|disp=flip}} ||rowspan=2|{{cvt|76x76.5|mm|in|2}}||{{cvt|80|PS|kW hp|0}} at 5700 || {{cvt|124|Nm|lbft|0}} at 3500
|-
|2008–||{{cvt|96|PS|kW hp|}}|| {{cvt|125|Nm|lbft|}}
|-
|1.6 Duratec||2004–||{{cvt|1596|cc|L cuin|1|disp=flip}} ||{{cvt|79x81.4|mm|in|2}}||{{cvt|100|PS|kW hp|0}} at 6000 || {{cvt|150|Nm|lbft|0}} at 4000
|}

{{Table alignment}}
{|class="wikitable defaultcenter collapsible collapsed"
|+Duratec technical details
|-
!style="text-align:left"|Engine
|2008 1.25 Duratec 60/{{cvt|82|hp|kW PS|0}}<br />2008 1.4 Duratec {{cvt|96|hp|kW PS|0}}||2007 1.4 Duratec {{cvt|80|hp|kW PS|0}}||2007 1.6 Duratec {{cvt|100|hp|kW PS|0}}
|-
!style="text-align:left"|Vehicle
|Fiesta Mk6||Focus MkII face-lift||Focus MkII face-lift
|-
!style="text-align:left"|Valve gear
|colspan="3"|[[DOHC]], mechanical tappets, belt drive
|-
!style="text-align:left"|Valves per cylinder
|colspan="3"|4
|-
!style="text-align:left"|Camshaft drive
|colspan="3"|Belt
|-
!style="text-align:left"|Crankshaft
|colspan="3"|Spheroidal
|-
!style="text-align:left"|Crankshaft bearings
|colspan="3"|5
|-
!style="text-align:left"|Engine management
|colspan="3"|[[Siemens]]
|-
!style="text-align:left"|Fuel injection
|colspan="3"|[[Electronic fuel injection#Electronic injection|EFI]]
|-
!style="text-align:left"|Ignition
|colspan="3"|Electronic distributor-less, wasted spark
|-
!style="text-align:left"|Emission control
|colspan="3"|Close-coupled, closed loop, three-way catalyst with oxygen sensor
|-
!style="text-align:left"|Emission level
|colspan="3"|Euro4
|-
!style="text-align:left"|Lubrication system
|colspan="3"|Pressure-fed lubrication system with full flow oil filter
|-
!style="text-align:left"|Lubrication system capacity with/without filter (L)
|colspan="2"|3.8/3.5||4.1/3.75
|-
!style="text-align:left"|Cooling system
|colspan="3"|Water pump with thermostat and valves
|-
!style="text-align:left"|Cooling system capacity, incl. heater
|colspan="2"|5.5||5.8
|-
!style="text-align:left"|Fuel type
|colspan="3"|[[Unleaded petrol|ULP]]
|-
!style="text-align:left"|Fuel grade
|colspan="3"|95 [[Octane rating|RON]]
|}

==Duratec Ti-VCT==
The {{cvt|1596|cc|L cuin|1|order=flip}} '''Ti-VCT''' ([[Variable camshaft timing#Ti-VCT|Twin independent Variable Camshaft Timing]]) version includes [[variable valve timing]], and generates more power and torque than non-VVT counterparts. Latest versions comply with the Euro5 emission level.

{|class="wikitable"
!Code!!Years!!Displacement!!Bore x stroke!!Power!!Torque!!Compression
|-
|1.5 Duratec Ti-VCT||2013–||{{cvt|1499|cc|L cuin|1|order=flip}} ||{{cvt|79x76.5|mm|in|2}}||{{cvt|112|PS|kW hp|0}} at 6300||{{cvt|140|Nm|lbft|0}} at 4300||rowspan=7|11.0:1
|-
|rowspan=6|1.6 Duratec Ti-VCT||2004–||rowspan=6|{{cvt|1596|cc|L cuin|1|order=flip}} ||rowspan=6|{{cvt|79x81.4|mm|in|2}}||{{cvt|115|PS|kW hp|0}} at 6000||{{cvt|155|Nm|lbft|0}} at 4150
|-
|rowspan=2|2007–||{{cvt|110|PS|kW hp|0}} at 6000||{{cvt|152|Nm|lbft|0}} at 4050
|-
|{{cvt|125|PS|kW hp|0}} at 6300||rowspan=2|{{cvt|160|Nm|lbft|0}} at 4100
|-
|2008–||{{cvt|120|PS|kW hp|0}} at 6300
|-
|2010–||{{cvt|105|PS|kW hp|0}} at 6000||{{cvt|150|Nm|lbft|0}} at 4000–4500
|-
|2011–||{{cvt|134|PS|kW hp|0}} at 6700||{{cvt|160|Nm|lbft|0}} at 4250
|}

{{Table alignment}}
{|class="wikitable defaultcenter col1left collapsible collapsed"
|+Duratec Ti-VCT technical details
|-
!style="text-align:left"|Engine
|2007 1.6 Duratec Ti-VCT {{cvt|110|hp|kW PS|0}}<br />2007 1.6 Duratec Ti-VCT {{cvt|125|hp|kW PS|0}}<br />2008 1.6 Duratec Ti-VCT {{cvt|120|hp|kW PS|0}}<br />2010 1.6 Duratec Ti-VCT {{cvt|120|hp|kW PS|0}}
|2007 1.6 Duratec Ti-VCT {{cvt|115|hp|kW PS|0}}
|2011 1.6 Duratec Ti-VCT {{cvt|105|hp|kW PS|0}}/{{cvt|125|hp|kW PS|0}}
|-
!style="text-align:left"|Vehicle
|Mondeo<br />Mondeo face-lift<br />Fiesta Mk6
|Focus MkII face-lift
|Focus MkIII
|-
!style="text-align:left"|Valve gear
|DOHC, tappets||DOHC||DOHC, twin independent variable cam timing
|-
!style="text-align:left"|Valves per cylinder
|colspan="3"|4
|-
!style="text-align:left"|Included angle between valves
|41.75° ||  ||
|-
!style="text-align:left"|Valve sizes
|Intake {{cvt|30|mm}}, exhaust {{cvt|24.1|mm}} ||  ||
|-
!style="text-align:left"|Camshaft drive
|colspan="2"|Belt||Belt with dynamic tensioner
|-
!style="text-align:left"|Crankshaft
|4 counter-weights|| ||Cast iron, 4 counter-weights
|-
!style="text-align:left"|Crankshaft bearings
| ||colspan="2"|5
|-
!style="text-align:left"|Engine management
|Siemens ECM EMS2101 16-bit||Siemens||Siemens ECM EMS2101 16-bit
|-
!style="text-align:left"|Fuel injection
|colspan="3"|[[Electronic fuel injection#Electronic injection|EFI]]
|-
!style="text-align:left"|Ignition
|Tower coil||Electronic distributor-less||
|-
!style="text-align:left"|Emission control
|Hego/CMS dual binary sensors||colspan="2"|Close-coupled, closed loop, three-way catalyst with oxygen sensor
|-
!style="text-align:left"|Emission level
|colspan="2"|Euro4||Euro5
|-
!style="text-align:left"|Lubrication system
| ||colspan="2"|Pressure-fed lubrication system with full flow oil filter
|-
!style="text-align:left"|Lubrication system capacity with/without filter (L)
| ||4.1/3.75||4.1/
|-
!style="text-align:left"|Cooling system
| ||colspan="2"|Water pump with thermostat and valves
|-
!style="text-align:left"|Cooling system capacity, incl. heater
| ||6.0||5.5
|-
!style="text-align:left"|Fuel type
|colspan="3"|[[Unleaded petrol|ULP]]
|-
!style="text-align:left"|Fuel grade
|colspan="3"|95 [[Octane rating|RON]]
|}

==Crate engine versions==
[[Crate engine]] versions of Zetec-SE engines are sold by Ford Power Products under the name '''ZSG Range'''.

{| class="wikitable"
|-
!Code!!Years!!Displacement!!Bore x stroke!!Power at rpm!! torque at rpm!!Compression
|-
|ZSG 414||rowspan=2|?–||{{cvt|1388|cc|L cuin|1|order=flip}} ||{{cvt|76x76.5|mm|in|2}}||{{cvt|75|PS|kW hp|0}} at 5700 || {{cvt|124|Nm|lbft|0}} at 3500||rowspan=2|11.0:1
|-
|ZSG 416||{{cvt|1595|cc|L cuin|1|order=flip}} ||{{cvt|79x81.4|mm|in|2}}||{{cvt|100|PS|kW hp|0}} at 6000 || {{cvt|146|Nm|lbft|0}} at 4000
|-
|}

==Applications==
{| class="wikitable"
|-
!Displacement!!ratings!!vehicles
|-
!rowspan=3|{{cvt|1242|cc|L cuin|1|order=flip}}
|{{cvt|60|PS|kW hp|0}}, {{cvt|109|Nm|lbft|0}}|| 
*2008–2017 [[Ford Fiesta (sixth generation)|Ford Fiesta Mk6]]
|-
|{{cvt|75|PS|kW hp|0}} at 6000, {{cvt|110|Nm|lbft|0}} at 4000||
*1995–2002 [[Ford Fiesta (fourth generation)|Ford Fiesta Mk4]] 1.25
*2002–2008 [[Ford Fiesta (fifth generation)|Ford Fiesta Mk5]] 1.25
*2002–2007 [[Mazda2#DY|Mazda2 (DY)]] 1.25
|-
|{{cvt|80|PS|kW hp|0}}, {{cvt|114|Nm|lbft|0}}||
*2008–2017 [[Ford Fiesta (sixth generation)|Ford Fiesta Mk6]]
|-
!rowspan=4|{{cvt|1388|cc|L cuin|1|order=flip}}
|{{cvt|75|PS|kW hp|0}}, {{cvt|124|Nm|lbft|0}}||
*1998–2004 [[Ford Focus (first generation)|Ford Focus Mk 1]] 1.4
|-
|{{cvt|80|PS|kW hp|0}} at 5700, {{cvt|124|Nm|lbft|0}} at 3500||
*2002–2008 [[Ford Fiesta (fifth generation)|Ford Fiesta Mk5]] 1.4
*2002–2010 [[Ford Fusion (Europe)|Ford Fusion]] 1.4
*2002–2007 [[Mazda2#DY|Mazda2 (DY)]] 1.4
|-
|{{cvt|90|PS|kW hp|0}}, {{cvt|125|Nm|lbft|0}}||
*1995–2002 [[Ford Fiesta (fourth generation)|Ford Fiesta Mk4]] 1.4
*1997–2000 [[Ford Puma (coupé)|Ford Puma]] 1.4
*2012–2017 [[Ford B-Max]] 1.4
|-
|{{cvt|96|PS|kW hp|0}}, {{cvt|125|Nm|lbft|0}}||
*2008–2019 [[Ford Fiesta (sixth generation)|Ford Fiesta Mk6]]
|-
!rowspan=1|{{cvt|1499|cc|L cuin|1|order=flip}} (with Ti-VCT)
|{{cvt|112|PS|kW hp|0}}, {{cvt|140|Nm|lbft|0}}||
*2013–2023 [[Ford EcoSport]] 1.5
*2013–2019 [[Ford Fiesta (sixth generation)|Ford Fiesta Mk6]] 1.5
|-
!rowspan=2|{{cvt|1596|cc|L cuin|1|order=flip}}
|{{cvt|100|PS|kW hp|0}} at 6000, {{cvt|145|Nm|lbft|0}} at 4000||
*1998–2004 [[Ford Focus (first generation)|Ford Focus Mk 1]] 1.6
*1999–2002 [[Ford Fiesta (fourth generation)|Ford Fiesta Mk4]] 1.6
*2002–2008 [[Ford Fiesta (fifth generation)|Ford Fiesta Mk5]] 1.6
*2000–2002 [[Ford Puma (coupé)|Ford Puma]] 1.6
*2002–2010 [[Ford Fusion (Europe)|Ford Fusion]] 1.6
*2002–2007 [[Mazda2#DY|Mazda2 (DY)]] 1.6
*2004–2012 [[Volvo C30]] 1.6
*2004–2012 [[Volvo S40#Second|Volvo S40]] 1.6
*2004–2012 [[Volvo V50]] 1.6
|-
|{{cvt|100|PS|kW hp|0}} at 6000, {{cvt|150|Nm|lbft|0}} at 4000||
*2004–2011 [[Ford Focus (second generation, Europe)|Ford Focus Mk 2]] 1.6
*2003–2010 [[Ford Focus C-MAX]] 1.6
*2002–2008 [[Ford Fiesta (fifth generation)|Ford Fiesta Mk 5]] 1.6
|-
!rowspan=5|{{cvt|1596|cc|L cuin|1|order=flip}} (with Ti-VCT)
|{{cvt|115|PS|kW hp|0}} at 6000, {{cvt|155|Nm|lbft|0}} at 4150||
*2004–2011 [[Ford Focus (second generation, Europe)|Ford Focus Mk 2]] 1.6
*2004–2010 [[Ford C-MAX]] 1.6
*2007–2014 [[Ford Mondeo Mk3]] 1.6
|-
|{{cvt|120|PS|kW hp|0}} at 6000, {{cvt|152|Nm|lbft|0}} at 4050||
*2008–2019 [[Ford Fiesta (sixth generation)|Ford Fiesta Mk6]]
|-
|{{cvt|105|PS|kW hp|0}} at 6000, {{cvt|150|Nm|lbft|0}} at 4000–4500||
*2011–2019 [[Ford Focus (third generation)|Ford Focus Mk3]] 1.6
*2010–2019 [[Ford C-Max]] 1.6
*2012–2017 [[Ford B-Max]] 1.6
|-
|{{cvt|110|PS|kW hp|0}} at 6300, {{cvt|160|Nm|lbft|0}} at 4100||
*2007–2014 [[Ford Mondeo Mk4]] 1.6
|-
|{{cvt|125|PS|kW hp|0}} at 6000, {{cvt|159|Nm|lbft|0}} at 4000||
*2008–2014 [[Ford Mondeo Mk4]] 1.6
*2011–2019 [[Ford Focus (third generation)|Ford Focus Mk3]] 1.6
*2010–2019 [[Ford C-Max]] 1.6
|-
!rowspan=2|{{cvt|1679|cc|L cuin|1|order=flip}} (with VCT)
|{{cvt|126|PS|kW hp|0}} at 6300, {{cvt|157|Nm|lbft|0}} at 4500||
*1997–2002 [[Ford Puma (coupé)|Ford Puma]] 1.7
|-
|{{cvt|155|PS|kW hp|0}} at 7000, {{cvt|162|Nm|lbft|0}} at 4500||
*1999–2000 Ford Racing Puma 1.7
|}

==Current use==
The Ford Sigma engine was produced at Bridgend Ford in Wales, U.K. until September 2020 and at Taubate Engine and Transmission Plant, Taubate, São Paulo, Brazil. Today the Sigma engine is used as the basis for the four cylinder Ford Ecoboost 1.5 litre and 1.6 litre engines. A {{cvt|110|bhp|kW PS|0}} version was used by Morgan for their [[Morgan 4/4|4/4 Roadster]] coupled to a Mazda transmission from 2009 until the model was discontinued in 2018.<ref name=Moggie2011>{{cite web | url = http://www.morgan-motor.co.uk/mmc/carrange/44/44morgan.html#!prettyPhoto | publisher = The Morgan Motor Company | title = 4/4: Specifications | accessdate = 2013-06-05 }}</ref>

===1.25/1.4/1.6&nbsp;L Sigma===
These engines in the first generation Focus produced 75 and {{Convert|100|bhp|kW PS|0}} respectively, but for MkII Focus the 1.4 variant was slightly modified and produced {{Convert|80|bhp|kW PS|0}}. Both engines have belt driven camshafts and Electronic Fuel Injection systems. They weigh {{Convert|90|kg|0}}.<ref>{{citation | url = http://www.ctm.it/pdf/Powertrain%20Product%20Guide%202007.pdf | archive-url = https://web.archive.org/web/20230315023127/http://www.ctm.it/pdf/Powertrain%20Product%20Guide%202007.pdf | archive-date = 2023-03-15 | title = Powertrain Product Guide, Issue no. 1 | work = Ford Component Sales Limited | publisher = Ford Motor Company | location = Essex, UK | pages = 9–11 | date = December 2007 }}</ref><ref>{{citation | url = http://www.api.org/certifications/engineoil/new/upload/1_Customer_Focused_Technology_Transition_BSamardizich_Ford_DAP_Forum_April_20_2010.pdf | date = 2010-04-20 | title = Customer Focused Technology Transition | first = Barb | last = Samardzich | archive-url = https://web.archive.org/web/20101225072537/http://www.api.org/certifications/engineoil/new/upload/1_Customer_Focused_Technology_Transition_BSamardizich_Ford_DAP_Forum_April_20_2010.pdf | archive-date = 2010-12-25 | publisher = Ford Motor Company | work = 36th API Automotive / Petroleum Industry Forum }}</ref> The 1.6 Ti-VCT was introduced in 2004, it features Variable Cam Timing; this {{Convert|115|bhp|kW PS|0}} version is used in MkII Focus. A new {{Convert|105|bhp|kW PS|0}} or {{Convert|125|bhp|kW PS|0}} EU5 version is used in the MkIII Focus, also a 1.6&nbsp;L {{Convert|120|hp|kW PS|0}} version is used in Ford Fiesta Zetec-S. The Sigma is usually coupled to the [[Ford BC-series transmission|Ford IB5]] five-speed [[manual transmission]].

====Brazil====
Recently the Sigma engine was present in modern Brazilian versions of the Fiesta, Focus and Ecosport (1.6&nbsp;L TI-VCT version) and a 1.5 version was used by Ka. This engine was able to use the flex technology.

Power with ethanol:
* 1.5&nbsp;L Sigma (non TI-VCT) — IB5+ manual transmission
** Fiesta (2014–2016) — {{Convert|112|PS|kW hp|0}}
** Ka (2014–2021) — {{Convert|110|PS|kW hp|0}}
* 1.6 Sigma (non TI-VCT) — IB5+ manual transmission (both) and PowerShift (Fiesta Only).
** Fiesta (2008–2014) — {{Convert|116|PS|kW hp|0}}
** Ecosport (2012–2023) — {{Convert|116|PS|kW hp|0}}
* 1.6 Sigma TI-VCT — IB5+ manual transmission and PowerShift.
** Focus (2013–2019) — {{Convert|135|PS|kW hp|0}}
** Fiesta (2008–2014) — {{Convert|128|PS|kW hp|0}}
** Ecosport (2012–2023) — {{Convert|131|PS|kW hp|0}}


*In 2018 the Sigma engine was replaced in all Ford compact/subcompact cars to the newer and stronger "Dragon" engine, displacing 1.5&nbsp;L with a 3-Cylinder layout and with a power output of 136HP.

==Caterham usage==
Some [[Caterham Cars]] use modified Ford Sigma engines<ref>[http://uk.caterhamcars.com/cars/seven-270 caterhamcars.com]</ref> such as the Caterham Seven 270, which uses a tuned Sigma engine producing {{Convert|135|hp|kW PS|0}} at 6,800&nbsp;rpm as a modern equivalent to the original Ford Kent Crossflow engine used in the Lotus 7 from 1957 to 1972.<br />
Ford Sigma 1.6-litre overview Technical features:
* a high level of running refinement and low emission levels
* aluminium alloy cylinder block and head
* cross flow cylinder head
* structural aluminium oil-pan for increased engine stiffness
* individual throttle bodies in place of the standard intake manifold
* twin overhead camshafts each with five bearings
* sequential multi-port fuel injection system
* long life, [[glass fibre]] reinforced camshaft drive belt with automatic tensioner
* state-of-the-art Twin Independent Variable Camshaft Timing (on Ti-VCT variant)

{| class="wikitable"
|-
!Code!!Displacement!!Bore x stroke!!Power at rpm!! torque at rpm!!Compression
|-
|rowspan=2|Ford Sigma 1.6||rowspan=3|{{cvt|1595|cc|L cuin|1|order=flip}} ||rowspan=3|{{cvt|79x81.4|mm|in|2}}?||{{cvt|125|PS|kW hp|0}} at 6100 || {{cvt|162|Nm|lbft|0}} at 5350||rowspan=3|11.0:1
|-
|{{cvt|150|PS|kW hp|0}} at 6900 || {{cvt|162|Nm|lbft|0}} at 5600
|-
|Caterham Sigma 1.6 Ti-VCT EU4||{{cvt|115|PS|kW hp|0}} at 6000 || {{cvt|155|Nm|lbft|0}} at 4150
|-
|}

==SCCA Spec Racer==
The third generation of the [[Sports Car Club of America|SCCA]] [[Spec Racer Ford|Spec Racer]], commonly known as the Gen3 was introduced in 2015,<ref>{{cite web | url = http://www.scca-e.com/spec-racer-ford | publisher = SCCA Enterprises | title = Spec Racer Ford | accessdate = 2016-11-12 }}</ref> and uses the 1.6&nbsp;L Sigma engine. The engine is sold by SCCA Enterprises as a sealed unit.

==Zetec-E comparison==
The Zetec-SE has no common parts or design with the larger [[Ford Zeta engine|Zetec-E]] engines apart from the name. This gives rise to some confusion since it suggests that they are members of the same family when they are, in fact, completely different. Zetec-E units are [[Transverse engine|mounted transversely]] with the [[inlet manifold]] at the rear, whereas the Zetec-SE units are mounted with the inlet manifold at the front.

==Replacement==
In 2012 Ford replaced the Sigma engine with a brand new [[Straight-three engine|3-cylinder]] 1.0-litre [[Ford EcoBoost engine|EcoBoost]] engine for some markets and models. The new engine provides more power and torque with less [[Fuel consumption in automobiles|fuel consumption]] and lower [[Carbon dioxide|{{CO2}}]] emissions.<ref>[http://www.themotorreport.com.au/53407/ford-focus-picks-up-10-litre-ecoboost-australian-debut-unclear Ecoboost replaces Duratec], themotorreport.com.au, 05. February 2012.</ref>

==See also==
*[[List of Ford engines]]

==References==
{{reflist}}

==External links==
{{commons category}}
* {{cite web | title=ZSG Range Leaflet | work=Ford Power Products | url=http://www.i-m-a.de/pdf/Ford/gasoline_gaseous_engines/ZSG_Range_Leaflet_4_2003.pdf }}

{{DEFAULTSORT:Ford Sigma Engine}}
[[Category:Ford engines|Sigma]]
[[Category:Gasoline engines by model]]
[[Category:Straight-four engines]]